i received a call for 817-896-4377 but I do not recognize the number and CALLER ID info field on my phone display contained the single word "UNAVAILABLE" so did not answer it. The call should have gone to voice mail but caller hung up and left no message. I allowed about ten minutes to elapse and then attempted to call back. I heard a non-USA-accented (British sounding) english recording that stated something similar to the following: "The person you are calling is unavailable, please leave a message after the tone." I hung up at that point and left no response. According to several sources the number belongs to a Houston TX exchange, but I do not have any additional information.